A sprocket is a wheel with the teeth, cogs, or even sprockets that mesh with the holes in the links of chain, monitor, or other perforated materials. A sprocket differs from a gear just because a sprocket never meshes directly with another sprocket. Sprockets are designed to be used with a particular chain. Selecting the most appropriate sprocket optimizes sprocket/chain planetary gearbox conversation, ensures drive overall performance, and decreases maintenance.